3
Safety Techniques
The high voltage circuit of the MegaPulse 1.2x50-12.3PF-1 500ohm 0.5J can be shut off at any
time by turning OFF the rear power switch. Always press TRIGGER to discharge the tester
before turning OFF.
The MegaPulse tester is provided with a digital VOLTAGE ADJUST knob on the front panel.
This voltage setting should always confirmed by pressing the VOLTAGE ADJUST knob before
starting any test.
The MegaPulse tester is provided with a
CHARGE
switch that is in the unarmed "Standby"
setting when the tester is first turned ON. When the yellow
CHARGE
button is lit, the tester
will not provide high voltage until the
CHARGE
Button and the
TRIGGER
Button have been
pressed in order. To prevent inadvertent operation, the operator should be instructed not to press
the
CHARGE
Button until the test is ready.
The MegaPulse tester has been designed for one-touch operation with the right hand. If possible,
it should be set up to the left and in front of the equipment under test. The equipment under test
should be connected to the MegaPulse tester and then left alone by the operator. After the
operator is clear of the Tester and the equipment under test, the operator should turn the rear-
panel power switch to ON, press the
CHARGE
Button, adjust the voltage to the desired level (as
displayed on the front panel meter), then press the
TRIGGER
Button, with his right hand. This
will allow the greatest separation between the operator and the test being conducted. Note that
the CHARGE process will stop after 2 minutes if the TRIGGER button is not pressed.
The MegaPulse tester is designed to bleed the high voltage away after the test has concluded. In
order to ensure that any voltage present in the equipment being tested has been completely bled
away, the operator should not unplug the equipment under test from the MegaPulse until the
front panel meter reads a safe level (40 volts or less is generally considered a safe level).
Pressing the TRIGGER button before disconnecting main power (or turning the equipment off)
will ensure that the internal capacitors are discharged as much as possible.
Using the MegaPulse Impulse Tester
The impulse test involves high voltage and caution should be exercised when using the tester.
The
RETURN
lead is referenced to building ground when properly connected. However, both
the
OUTPUT
and
RETURN
leads must always be treated as Hazardous whenever the power
switch of the MegaPulse is in the ON position.
The MegaPulse impulse tester generates the impulse waveform only; it does not determine
Passing or Failing results. It is the operator’s responsibility to monitor the output waveform and
determine Passing or Failing results. In monitoring the impulse waveform, consider the following
points: The Impulse waveform is high voltage and high frequency (short duration). Always
ensure that the measuring instrument (usually an oscilloscope with a high-voltage probe) is rated
for the voltage involved, and that the frequency response of the instrument and probe are capable
of measuring the output waveform of the MegaPulse Impulse Tester. A measuring instrument or
probe with a low frequency response will result in erroneous readings that could be mis-read.
Summary of Contents for MegaPulse 1.2x50-12.3PF-1
Page 1: ...MegaPulse IMPULSE TESTER 1 2x50 12 3PF 1 500ohm 0 5J Instruction Manual...
Page 3: ......
Page 5: ...1...
Page 12: ...8 Figure 5 Test Voltages and Tolerance from IEC 60255 5...
Page 29: ...25 Figure A 5 Breakdown as the voltage is rising...
Page 30: ...26 Figure A 6 Dieletric breakdown immediately after Vpeak...
Page 31: ...27 Figure A 7 Dielectric breakdown after Vpeak delayed breakdown...
